精品解析:2023年四川省泸州市中考化学真题(解析版)
2023年四川省泸州市中考化学试卷一、选择题(7~14题为化学题;只有一个选项符合题目要求。)化学1.下列属于人体呼吸作用的交换物质,且在呼出气体中,比吸入气体含量多的是A.N2B.O2C.COD.CO2【答案】D【解析】【详解】人呼吸时把空气中的氧气转化为二氧化碳,同时从体内带出水蒸气,人体呼出气体和空气中的氧气、二氧化碳、水蒸气含量不同,呼出的气体与吸入空气相比,具有“两多一少”的特点,即与吸入的空气相比,二氧化碳、水蒸气含量增加,氧气含量减少,稀有气体没有参加反应,量几乎不变;故属于人体呼吸作用的交换物质,且在呼出气体中,比吸入气体含量多的是CO2。故选:D。2.《泸州市垃圾分类管理条例...
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